package com.store.practice.component;

import com.store.practice.common.utils.JwtTokenUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
    private static final Logger logger = LoggerFactory.getLogger(JwtAuthenticationTokenFilter.class);
    @Autowired
    private UserDetailsService userDetailsService;
    @Autowired
    private JwtTokenUtil jwtTokenUtil;
    @Value("${jwt.tokenHeader}")
    private String tokenHeader;
    @Value("${jwt.tokenHead}")
    private String tokenHead;


    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        String head = request.getHeader(tokenHeader);
        if (head!=null&&head.startsWith(tokenHead)){
            String token = head.substring(tokenHead.length());
            String username = jwtTokenUtil.getUsernameFromToken(token);
            logger.info("checking username :{}",username);
            if (username!=null&& SecurityContextHolder.getContext().getAuthentication()==null){
                UserDetails userDetails = userDetailsService.loadUserByUsername(username);
                UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());
                authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
                logger.info("authenticated user:{}",username);
                SecurityContextHolder.getContext().setAuthentication(authentication);
            }
        }
        filterChain.doFilter(request,response);
    }
}
